What is a high voltage pen, how to change a high voltage pen

The high-voltage electric pen, also known as the high-voltage electric tester, is used for the operation of 10kV and above projects.

The voltage tester is also called the electric tester, referred to as the "electric pen". It is an electrician's tool used to test whether there is electricity in a wire. There is a neon bubble in the pen body, if the neon bubble glows during the test, it means that the wire is electrified, or it is the live wire of the path.

The nib and tail of the pen are made of metal materials, and the barrel is made of insulating materials. When using the tester, be sure to touch the metal part at the end of the tester with your hands, otherwise, because the charged body, the tester, the human body and the earth do not form a loop, the neon bubble in the tester will not glow, resulting in misjudgment, thinking that the charged body is not charged.

According to the level of the measurement voltage, it is divided into: High-voltage voltage tester: used for 10kV and above project operations, for the electrician's daily testing tools; Low-voltage voltage tester:

It is used for the detection of live bodies for projects with line voltage of 500V and below. Weak current voltage tester: used for the test of electronic products, the general test voltage is 6V--24V

For ease of use, the pen often has a lead wire with a clip at the end. According to the contact method, the contact type voltage tester: a detection tool that obtains an electrical signal by contacting a charged body.

Usually the shape is a flathead screwdriver, and it is also used for a test pen and a flathead screwdriver; Fountain pen type, which displays the measurement data directly in the LCD window. Inductive Voltage Tester: Inductive testing without physical contact to check the voltage on control wires, conductors and sockets or to check the location of open circuits along conductors.

It can greatly protect the personal safety of inspectors.

A high-voltage pen is a pen that can measure high voltage and will not harm the human body. It is recommended to use the third type of electric pen below, which is safer and can measure high voltage remotely through the insulator.

Now there are three types of electric pens, depending on which type you use:

1.Ordinary neon bubble type: This is the easiest, press the tail with your hand, use the bit to touch the metal bit, the light is on, and it is a non-voltage charged body.

2.Digital display type: press and hold the metal button on the pen with your hand, touch the metal bit with the bit, and display the number on the display screen, which can roughly judge the voltage of the live conductor, which can only be used as a reference, and cannot be set as a practical value.

3.Non-contact induction type: This kind of electric pen is a signal sent by the electric pen itself to induce the electromagnetic field generated by the charged body.

When there is voltage in the conductor, it will produce an electromagnetic field, which is also called radiation and is harmful to the human body. Use the head of this electric pen to go directly close to the live conductor, regardless of whether there is an insulator outside the conductor, as long as it is charged and has an electromagnetic field, the electric pen receives the signal, and it will alarm in two ways with sound and LED light flashing, reminding the surrounding electromagnetic field, which is safer and more convenient to operate than the first two

The principle of the high-voltage electric pen is very simple, mainly in the neon tube, which is responsible for emitting light, and some fuses are also used in the small neon tube, and there is a resistor inside, the resistance is very large, which plays the role of limiting the current and the voltage distribution, only in this way, when people touch the small metal pieces behind, can the safety of human life be guaranteed.

In fact, the principle of the high-voltage pen is very simple, the key is in the neon tube, the neon tube is responsible for emitting light, and some fuses are also used in the small neon tube, there is a resistance inside, the resistance is very large, which plays the role of limiting the current and dividing the voltage, only in this way can the safety of human life be ensured when people touch the small metal pieces behind.

A laptop refers to a laptop computer. Notebook (English: notebook, abbreviated as notebook), Chinese called notebook, laptop and laptop (English:

laptop-computer, abbreviated as laptop).

A notebook computer, also known as a portable computer, is a small and portable personal computer. The current trend is that the size is getting smaller and smaller, the weight is getting lighter and lighter, and the function is becoming more powerful and percolated.

Although the body of the laptop is very lightweight, it is fully capable of daily operation and basic business, entertainment, and computing operations. Today's laptops are differentiating different trends according to their uses, netbooks tend to be daily office and movies, business laptops tend to be stable and low power consumption to obtain longer battery life, home laptops have good performance and high cost performance, and gaming laptops are specially designed to cater to a small number of people going out to play games, audiophile configuration, and good entertainment experience.

Converting the circuit of a high-voltage pen to a low-voltage circuit requires certain electronic knowledge and skills. Here are some possible retrofit steps:1

Open the high-voltage pen and locate the circuit board and battery. 2.Determine the high-voltage portion of the circuit board, which is usually a high-voltage transformer and a capacitor.

3.Remove the high-voltage transformer and capacitor and replace them with a low-voltage Zhihuai transformer and capacitor. 4.

Connect the low-voltage transformer and capacitor to the corresponding location on the circuit board. 5.Check that the circuit is connected correctly and reassemble the pen.

6.Use a voltmeter to test the output voltage of the pen to make sure it is within a safe range. Please note that retrofitting a high-voltage pen requires caution to avoid electric shock and other safety issues.

If you're not sure how to do a retrofit, seek help from a professional.

The principle of the use of the voltage tester is as follows:

Ohm's law: i=u r;

2.The total resistance relationship of the series circuit: r=r1+r2;

3.The construction of the voltage tester and its characteristics.

Specifically: when the voltage tester goes to detect whether a conductor is a live wire or a neutral line, the current through the voltage tester (that is, the current through the human body) i is added to the total voltage u at both ends of the voltage tester and the human body, divided by (equivalent to the fractional line) the total resistance of the voltage tester and the two ends of the human body r

2.When measuring the live wire, the lighting circuit, there is a voltage between the live wire and the ground U=220V, the resistance of the human body is generally very small, usually only a few hundred to several thousand ohms, and the resistance inside the voltage tester is usually about a few trillion ohms, the current through the voltage tester (that is, the current through the human body) is very small, usually less than 1 milliampere, when such a small current passes through the human body, there is no harm to people, and when such a small current passes through the neon bubble of the electric tester, the neon bubble will glow.

3.When measuring the zero line, u=0, i=0, that is, there is no current through the neon bubble of the voltage tester, and the neon bubble does not emit light. In this way, we can tell whether the neon bubble is glowing or not.

Explanation of the electric pen A pen-like tool that tests whether the electrical appliance is leaking or whether the power phase is electrified. There are metal rods on the front end, a metal cap on the rear end, and a high-value resistor and neon tube in the middle. When using, touch the point of the measured electrical appliance or power supply with a small metal rod, and press the metal cap at the back end with your hand, if the measured point is electrified, the neon gas tube will glow.

Decomposition of Words Explanation of Electricity Electricity à A physical phenomenon of decay, an energy that can be obtained by chemical or physical methods to make a lamp glow, mechanically turn, etc.: electricity. Electrical energy.

Electric heating. Radio station. On a rainy day, the light emitted when the clouds in the air discharge and rolling:

Lightning. Thunder. Refers to the telegram:

Power. Message. Refers to the telegram:

Invitation Explanation of the pen Pen (pen) with preparation for trembling ǐ Tools for writing and drawing: brushes. Pen.

Pencil. Penholder. Pen gall.

The dots, horizontals, straights, apostrophes, and strokes that make up Chinese characters: strokes. Stroke order.

Pen-shaped. Pen Road. Write with a pen, write:

Penman. Ghostwrite. Pen tillage.

Pen talk. Clerical error. Translation.

Pen battles. Pseudonym. Writing and drawing.

1. The neon bubble luminous display voltage tester to test the voltage below 500V.

2. The electronic voltage tester with digital display has voltage level display, segmented display of the measured voltage value, and the highest identification voltage of 220V.

3. Weak current voltage tester: used for the test of electronic products, the general test voltage is 6V to 24V. For ease of use, the pen often has a lead-out wire with a clip at the end.

4. High-voltage voltage tester: used for 10kV and above project operations, and is a daily testing tool for electricians.

There are inductive digital electric pens, and there are old-fashioned neon tube luminous electric pens. As for which one is good, according to personal preference.

There are many kinds of electric pens, such as high-voltage electric pens and low-voltage electric pens, as well as digital and general electric pens, mainly according to the personal daily use preference of which type of habit which type, I personally think that the simplest commonly used household electric pen can be enough for the general family.

Regardless of the type, as long as you like.

High-voltage electric detector: A tool used to check whether the high-voltage network substation and distribution equipment, overhead lines, and cables are live. Also known as electroscope.